Valve grinder



Patente-,e3 i3, lili/3'?.

zillillwlliii ALEXANDER J". MCINTOSH., OF TORONTO, ONTARI, CANADA.

p 'VALVE GRINDER.

Application filed September 2li, 1920. Serial No. i-12,598.

.To all 1li/loinz't'wmg/ concern Be it known that l, Arfsxfiivnnn JAMn-ison lilolNrosn, a resident oi the city ot Toronto, in the county of York, in the Province of Ontario. Canada, have invented certain new and useiiul improvements in Valve Grinders, ot' which the following is the specification.

My invention'relates to improvements in valve grinders and the object ot the invention is to devise a valve grinder which will produce an even surface on the valve and valve seat vso as to prevent any leakage of compression when the valve is seated. Y A further object is to devise a valve grinder which will permit oscillatory movement being imparted to the valve and at the same time by further actuating the valve grinder permit interrupted circular movement being imparted to the valve.

`lilly invention consists of a valve grinder constructed and arranged substantially as hereinafter more particularly described and illustrated in the accompanying drawings in which:

Fig. 1l represents an elevational view of a valve grinder constructed according to my invention.

Fig. 2 is a vertical section therethrough.

' Fig. 3 is a vertical section through a portion ot my valve grinder showing the upper portion compressed into the lower portion.

Fig. 4l is a cross sectional view through the line t-Ll Figure 3.

Like characters of reference indicate corresponding` parts in the different views.

1 is a hollow cylinder provided with a plurality of spiral grooves 2, each extending approximately halt way round the cylinder and so situated that linesV joining similar points will pass through the axis center of the hollow cylinder 1. cap adapted to be threaded into the lower portion of the cylinder l, said cap being provided with a depending shank 5 adapted to receive the upper end of the valve engaging member 6, such valve engaging member 6 being provided with a screw driver lower end or a pronged lower end 7, depending upon what type of valve is to be ground.

8 is an upper cap threaded into the upper end of the cylinder 1 and pro-vided with an upwardly extending hollow boss 9. 10 is a tube extending through thecap and boss 8 and 9 respectively and provided on its lower end with a piston or plunger 11, said tube having a cross slot 12 therethrough in the 4; is a lower screwI vicinity of its .lower end above the plunger 11. 111 are outwardly extending pins suitably secured to the plunger 11 and adapted to extend into the respective spiral grooves in the hollow cylinder 1.

13 is a disc portion suitably secured to the upper end of the tube 10 and carrying the clutch lever 14 fulcrumed on the bearing 15. 16 is a spiral spring adapted to engage the inner end ot the clutch lever 11i, such spring inserted into an indenture 17 in the upper surface of the disc portion. 1S'is a collar surrounding the disc portion 13 and provided with the slots 19 in its upper surface, said slots being preferably situated at each quadrant of the circular collar.

2O is a collar retaining ring suitably secured to the disc portion, said collar retaining` ring permitting the collar to freely rotate respectively tothe disc portion. 21 is a cap extending over the disc portion 13 and collar 1S and suitably secured to the latter by the screws 22, said cap being suitably serrated on its outside surface to permit of its ybeing readily gripped by the hand of the operator. 23 is a clutch actuating rod eX- tcnding through the tube 10 and provided with the offset upper toot 2-l adapted to engage the inner end of the lever 14.

25 is a lower offset ioot adapted to eX- tend through the slot 12 in the tube. 26 is a button seated in a cup-shaped indenture 27 in the top ot the lowerI cylinder cap 4;. and toperiuit the latter to rotate freely there/oi'. 28 is a spring` inserted in the hollow cylinder 1, the lower end of said spring engaging the button 2G and the upper end the plunger l1. 29 is collar freely mounted on the cylinder 1.

will now describe theoperat-ion of my valve grinder shown in Figures 1 to et.

The. valve engaging member 6 is applied to thevalve by inserting the screw driver 'end 7 in the slot in the head ot the valve. The operator then grasps the collar 29 with one hand and the cap 21 with the other. By imparting a vertical reciprocatory motion to the cap 21 the tube 10 is caused to move up and down and with it the plunger 11. lllllien this occurs the pins 111 slide iu the groove 2 in the hollow cylinder l. causing the same to be oscillated and thus imparting an oscillatory motion to the valve engaging member 6.

lt will be understood in this instance that during this operation the plunger 11 is not allowed to reach the upper limit o'l its movement, the operator taking short strokes. By allowing the plunger 1l to reach the upper limit ot' its movement by permitting the spring 28 to be expanded by the operator relieving any pressure on the cap 21, the foot 24 of the rod 23 will engage the inner end ot' the lever 14 thus depressing the same against the spring 16 and allowing the outer end to be disengaged trom the slot 19 in the collar 18.

By pressing down on the cap 21 again the Whole 'device will be lrotated about the cap for a quarter of a circle until the outer end Iot t-he lever 1st engages the next slot 19. This will consequently rotate the valve engaging member and engaged valve the quarter of a circle, when the operator, by taking short strokes, again imparts oscillatory motion to the valve., The above operations are carried out until the valve is completely ground.

ln the form of valve grinder above described it Will be seen that it is the hello-W cylinder that rotates and oscillates and not the plunger or piston. Also the valve engaging tool is connected to the cylinder.

From the above description it will he seen that l have devised a simple and et't'ective valve tool that will bc simple in use and Which can, be used effectivelyby persons inexperienced in grinding valves.

'Vhile l describe my tool as being` operat- .ed by hand it could with equal facility be operated by poiver.

. lllhat. I claim as my invention is: 'J

1. ln a valvel grinder, the combination with a valve engaging member, of means for oscillating said valve engaging' member, said successive oscillations of the valve engaging member being equal and on theI same arc and independent means i'or imparting progressive circular' movement thereto.

2. ln a valve grinder, the combination with a valve engaging member, oit means tor oscillating said valve engaging member, said successive oscillations of the valve engaging member being equal and on the same arc and independent means for automa-tically imparting interrupted progressive circular movement thereto.

3. In a valve grinder, the combination with a. valve engaging member, of a romanes@ tatable element attached thereto, la reciprocable element coacting therewith, said recipro-:able element upon being reciprocated oscillating the rotatable element, and means on the reciprocab-le member for imparting interrupted progressive circular movement to thel rotatable element.

4l. In a valve grinder, the combination with a valve engaging member, of a rotatable element attached thereto, a` recipro cable element coacting therewith, said reciprocable element upon being reciprocated oscillating the rotatable element, and means on the reciprocable element for imparting interrupted progressive circular movement 'to the rotatable element upon thc reciprocable element being permitted to reach the limit ot its stroke.

5. In a valve grinder, the combination stroke whereby on the commencement of the next stroke the rotatable member is rotated a part of a circle.

6. ln a valve grinder, the combination with a valve engaging member, of al rotatable element attac-hed thereto, a reciprocable element ceac-ting therewith, said reciprocable element upon being reciprocated oscillating the rotatable element and aittached valve engaging member, a clutch on the reciproca-ble element and a rod for tripping the clutch upon the reciprocable elen'ient reaching the limit of its stroke.

7. In a valve grinder,` the combination with the oscillable valve engaging member, oi a reciprocable member, coacting means between the reciproeable member and the oscillatable valve engaging member' for causing the latter to oscillate Within the conlines ot tivo fixed points and means for imparting interrupted, progressive., circular movement to the oscillatable valve engaging member.

A. J. Momrosn, n. A. 

